# Anderson localisation in steady states of microcavity polaritons

## TL;DR

This paper demonstrates experimentally controllable Anderson localisation of microcavity polaritons in a driven-dissipative system, showing potential for quantum devices and information processing.

## Contribution

It provides the first systematic study of disorder-induced localisation in microcavity polaritons, tuning localisation via disorder strength in a driven-dissipative environment.

## Key findings

- Localization degree increases with disorder strength
- Inverse-participation ratio quantifies localisation
- Realisation of disorder-induced localisation in a driven-dissipative system

## Abstract

We present an experimental signature of the Anderson localisation of microcavity polaritons, and provide a systematic study of the dependence on disorder strength. We reveal a controllable degree of localisation, as characterised by the inverse-participation ratio, by tuning the positional disorder of arrays of interacting mesas. This constitutes the realisation of disorder-induced localisation in a driven-dissipative system. In addition to being an ideal candidate for investigating localisation in this regime, microcavity polaritons hold promise for low-power, ultra-small devices and their localisation could be used as a resource in quantum memory and quantum information processing.